coder/site/src/components/CodeExample/CodeExample.tsx

114 lines
3.2 KiB
TypeScript

import type { Interpolation, Theme } from "@emotion/react";
import { visuallyHidden } from "@mui/utils";
import { type FC, type KeyboardEvent, type MouseEvent, useRef } from "react";
import { MONOSPACE_FONT_FAMILY } from "theme/constants";
import { CopyButton } from "../CopyButton/CopyButton";
export interface CodeExampleProps {
code: string;
secret?: boolean;
className?: string;
}
/**
* Component to show single-line code examples, with a copy button
*/
export const CodeExample: FC<CodeExampleProps> = ({
code,
className,
// Defaulting to true to be on the safe side; you should have to opt out of
// the secure option, not remember to opt in
secret = true,
}) => {
const buttonRef = useRef<HTMLButtonElement>(null);
const triggerButton = (event: KeyboardEvent | MouseEvent) => {
const clickTriggeredOutsideButton =
event.target instanceof HTMLElement &&
!buttonRef.current?.contains(event.target);
if (clickTriggeredOutsideButton) {
buttonRef.current?.click();
}
};
return (
/* eslint-disable-next-line jsx-a11y/no-static-element-interactions --
Expanding clickable area of CodeExample for better ergonomics, but don't
want to change the semantics of the HTML elements being rendered
*/
<div
css={styles.container}
className={className}
onClick={triggerButton}
onKeyDown={(event) => {
if (event.key === "Enter") {
triggerButton(event);
}
}}
onKeyUp={(event) => {
if (event.key === " ") {
triggerButton(event);
}
}}
>
<code css={[styles.code, secret && styles.secret]}>
{secret ? (
<>
{/*
* Obfuscating text even though we have the characters replaced with
* discs in the CSS for two reasons:
* 1. The CSS property is non-standard and won't work everywhere;
* MDN warns you not to rely on it alone in production
* 2. Even with it turned on and supported, the plaintext is still
* readily available in the HTML itself
*/}
<span aria-hidden>{obfuscateText(code)}</span>
<span css={{ ...visuallyHidden }}>
Encrypted text. Please access via the copy button.
</span>
</>
) : (
<>{code}</>
)}
</code>
<CopyButton ref={buttonRef} text={code} />
</div>
);
};
function obfuscateText(text: string): string {
return new Array(text.length).fill("*").join("");
}
const styles = {
container: (theme) => ({
cursor: "pointer",
display: "flex",
flexDirection: "row",
alignItems: "center",
color: theme.experimental.l1.text,
fontFamily: MONOSPACE_FONT_FAMILY,
fontSize: 14,
borderRadius: 8,
padding: 8,
lineHeight: "150%",
border: `1px solid ${theme.experimental.l1.outline}`,
"&:hover": {
backgroundColor: theme.experimental.l2.hover.background,
},
}),
code: {
padding: "0 8px",
flexGrow: 1,
wordBreak: "break-all",
},
secret: {
"-webkit-text-security": "disc", // also supported by firefox
},
} satisfies Record<string, Interpolation<Theme>>;